How does one become America's ubiquitous go-to gal on the subject of sex? For Susie Bright, it started with Catholic Mass and Girl Scouts, then segued into radical high-school politics; in 1984, she co-founded the first-ever female-focused sex magazine, On Our Backs. Bright tells all in her memoir Big Sex Little Death, which she discusses at Diesel (5433 College Ave., Oakland) on Saturday, Apr. 10. 3 p.m., free. DieselBookstore.com.